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+ − 1 ;;; float-sup.el --- detect absence of floating-point support in XEmacs runtime
+ − 2
+ − 3 ;; Copyright (C) 1985-7, 1997 Free Software Foundation, Inc.
+ − 4
+ − 5 ;; Maintainer: FSF
+ − 6 ;; Keywords: internal, dumped
+ − 7
+ − 8 ;; This file is part of XEmacs.
+ − 9
+ − 10 ;; XEmacs is free software; you can redistribute it and/or modify it
+ − 11 ;; under the terms of the GNU General Public License as published by
+ − 12 ;; the Free Software Foundation; either version 2, or (at your option)
+ − 13 ;; any later version.
+ − 14
+ − 15 ;; XEmacs is distributed in the hope that it will be useful, but
+ − 16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
+ − 17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ − 18 ;; General Public License for more details.
+ − 19
+ − 20 ;; You should have received a copy of the GNU General Public License
+ − 21 ;; along with XEmacs; see the file COPYING. If not, write to the Free
+ − 22 ;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ − 23 ;; 02111-1307, USA.
+ − 24
+ − 25 ;;; Synched up with: FSF 19.34.
+ − 26
+ − 27 ;;; Code:
+ − 28
+ − 29 ;; This file is dumped with XEmacs.
+ − 30
+ − 31 ;; Provide a meaningful error message if we are running on
+ − 32 ;; bare (non-float) emacs.
+ − 33 ;; Can't test for 'floatp since that may be defined by float-imitation
+ − 34 ;; packages like float.el in this very directory.
+ − 35
+ − 36 ;; XEmacs change
+ − 37 (or (featurep 'lisp-float-type)
+ − 38 (error "Floating point was disabled at compile time"))
+ − 39
+ − 40 ;; define pi and e via math-lib calls. (much less prone to killer typos.)
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+ − 41 (defconst pi (* 4 (atan 1)) "The value of Pi (3.1415926...)")
+ − 42 (defconst e (exp 1) "The value of e (2.7182818...)")
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+ − 43
+ − 44 ;; Careful when editing this file ... typos here will be hard to spot.
+ − 45 ;; (defconst pi 3.14159265358979323846264338327
+ − 46 ;; "The value of Pi (3.14159265358979323846264338327...)")
+ − 47
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+ − 48 (defconst degrees-to-radians (/ pi 180.0)
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+ − 49 "Degrees to radian conversion constant")
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+ − 50 (defconst radians-to-degrees (/ 180.0 pi)
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+ − 51 "Radian to degree conversion constant")
+ − 52
+ − 53 ;; these expand to a single multiply by a float when byte compiled
+ − 54
+ − 55 (defmacro degrees-to-radians (x)
+ − 56 "Convert ARG from degrees to radians."
+ − 57 (list '* (/ pi 180.0) x))
+ − 58 (defmacro radians-to-degrees (x)
+ − 59 "Convert ARG from radians to degrees."
+ − 60 (list '* (/ 180.0 pi) x))
+ − 61
+ − 62 ;; Provided in C code in XEmacs
+ − 63 ;; (provide 'lisp-float-type)
+ − 64
+ − 65 ;;; float-sup.el ends here